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Rh by his atronomical Dicoveries, Kepler by his Calculation, Des Cartes (at leat in his Dioptricks) and Sir Iaac Newton in all his Works, everally aw the Mechanim of the Springs of the World. The Geometricians have ubjected Infinity to the Laws of Calculation. The Circulation of the Blood in Animals, and of the Sap in Vegetables, have chang'd the Face of Nature with regard to us. A new kind of Exitence has been given to Bodies in the Air-Pump. By the Aitance of Telecopes Bodies have been brought nearer to one another. Finally, the everal Dicoveries which Sir Iaac Newton has made on Light, are equal to the boldet Things which the Curioity of Man could expect, after o many philoophical Novelties. Antonio de Dominis, the Rainbow was conider'd as an inexplicable Miracle. This Philoopher gues'd that it was a neceary Effect of the Sun and Rain. Des Cartes gain'd immortal Fame, by his mathematical Explication of this o